In a DC motor, the armature resistance and brush contact resistance remain relatively constant across different rotational positions because these components are primarily resistive and do not change with position. The brushes continuously maintain contact with the commutator segments as the armature rotates, ensuring a consistent electrical path. While the inductance and back EMF may vary with position, the resistance itself is a fixed characteristic determined by the materials and design of the armature and brushes. Therefore, the overall resistance remains substantially the same throughout the armature's rotation.
No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
Yes they do have a resistance. Even though a battery is a voltage source it has some thevenin resistance. Every lead plate and cell of sulfuric acid, will have a small resistance. The thevenin resistance is equivalent or sum of all those resistances.
The direction of the current flowing through it must be changed after every half rotation. Otherwise, when the north pole of the coil comes near the south pole of the magnet, there will be attraction between them and the coil will stop rotating.
yes
In a DC motor, the armature resistance and brush contact resistance remain relatively constant across different rotational positions because these components are primarily resistive and do not change with position. The brushes continuously maintain contact with the commutator segments as the armature rotates, ensuring a consistent electrical path. While the inductance and back EMF may vary with position, the resistance itself is a fixed characteristic determined by the materials and design of the armature and brushes. Therefore, the overall resistance remains substantially the same throughout the armature's rotation.
It does because it changes every half turn.
Yes, a circle has infinite rotational symmetry. This means that no matter how much you rotate a circle about its center, it will look the same at every angle.
25 days
Yes but it's not normally included
No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
The commutator is a rotating switch, which reverse the polarity of the generated voltage every half-cycle. So it acts to rectify the output voltage.
The earth rotates 360 degrees every 23 hours, 56 minutes and 4.100352 seconds.
The Sun is not solid; it is a ball of highly compressed plasma, which behaves like a little like a liquid. The polar areas of the Sun rotate in about 33 days, while the equatorial areas spin more quickly, in about 28 days.
This happens some where every single year. So to say "The Last" would be substantially incorrect.
Yes, there was resistance at every level, However what people could actually do was limited.